Fragility analysis of high CFRDs subjected to mainshock-aftershock sequences based on plastic failure
作者： Rui Pang , Bin Xu , Yang Zhou , Xu Zhang , Xingliang Wang
DOI: 10.1016/J.ENGSTRUCT.2019.110152
关键词:
摘要: Abstract Numerous earthquake disasters have demonstrated that secondary damage to structures induced by aftershocks may seriously threaten the seismic safety of since mainshock already weakened structural integrity. This paper investigates fragility a 200-m high concrete face rockfill dam (CFRD) subjected mainshock-aftershock sequences based on multiple stripes analysis (MSA). A modified generalized plasticity model and plastic-damage are used describe nonlinearity rockfills slabs, respectively. series nonlinear dynamic time history analyses for CFRD under with different intensity combinations conducted. The focuses deformations, shear strains index (DI) slabs. According results, vertical deformation is best indicator cumulative inflicted CFRD. Then, considering importance slab integrity performance CFRD, influences probability reaching specific limit state discussed DI. results reveal can significantly increase when it has been damaged mainshocks.
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